Improvement in sewing-machines



T. A. 'MACAULAY.

Sewing Machine.

Patented Jan. 24, 18 71.

. fm/eizfor:

tiniirh seat T. A. MA'O'AULAY, OF NEW YORK N. Y.

Letters Patent No. 111,129, dated January 24, I871.

IMPROVEMENT IN SEWlNG-'MACH|hlES.-

The Schedule referred to in these Letters Patent and making part of the same'.

To all to whomct may concern:

Be it known that I, '1. A. MAGAULAY, of New York, in the county and State of New York,'have invented certain Improvements in Sewing-Machines, of which the following is a specification.

The nature of my invention consists in the construction of the shuttle in such a" manner that only the upper part of the same shall bear against the shuttle-race face, while the lower edge or face of said shuttle is cut away so as to allow the loop of the thread to pass freely around the shuttle.

Figure I is a side elevation of'a sewing-machine, partlyiu section, embodying my improvement.

Figure II is a top view of the] shuttle-race detached.

Figure III is a cross-section of the same.

Figures IV V VI are different views of the shuttle.

Similar letters represent similar parts.

A represents the frame-iof the sewing-machine;

'B, the needle-arm, which receives from a crank on the shaft 0 a regular reciprocating motion D is the shuttle-race; and

E, the shuttle, operated in the usualmanner.

In the lower part of the shuttle-race D a recess, a, is made communicating with the recess 0, made for thepassage of the needle into the shuttle-race and extending some distance forward, to give sufiicient room for the thread-loop to lie in the same.

,The face of the shuttle E, which is represented in Fig. IV, bears against the face of the shuttle-race D only at its top edge u, from the point I) of the shuttle to a point, an, near the end of said shuttle.

The heel w of the shuttle and the surface of the bottom edge or face 7; and .thetoe or point I) are cut away, as shown in the drawing, as much as' the thiclc ness of a heavy or strong thread, to give a free and easy passage for the thread between the spool in the shuttle and the loop lying in the recess'a while the shuttle passes through the loop-thread.

' In machines where the shuttle is moved ontheend of a rocking arm the recess a in the bottom of the -shnttle-race will be dispensed with. This recess a being made for the purpose .of allowing a regular reciprocating motion being communicated to the needle- 7 arm in contraclistinctiou to a motion which will allow the needle-arm, and, consequently, the needle, to rest while the shuttle passes through the thread-loop,

.it is, therefore, notessentially necessary to give to the shuttle, as here described. and constructed as above specified, a rectilinear motion; but such a constructed shuttle may be combined with any other needle-arm having a regular reciprocating motion and the shuttle moved by any other arrangement or mechanism, and may be carried upon the end of a vibrat- I What I claim as my invention, and desire. to secure by Letters Patent, is I 1. The shuttle E, having its lower edge and heel and too cut away so that only itstop wall and point will, touch the race-face, substahtially as described,

and for the purpose set forth.

2. The shuttle E, constructed as described, when operating in connection with 'a needle and shuttle-carrier having a regular and reciprocating movement, as and for thepurpose set forth.

. T. A. MAOAULAY.

Witnesses HENRY. E. ROEDER, J 0111s ()nnrsrnn. 

